PowerShell script to set default value on a metadata (termstore) column in a SP 2010 document library?

Question

Is there a PowerShell script that will set the default value for a metadata (termstore) taxonomy column in a SharePoint 2010 document library?

Answer 1

Mirjam describes how to do this using code (C#) here. Shouldn't be to hard to convert her code to a PS script.